Type-writing machine.



F. C. ROBERTS. TYPE WRITING MACHINE APPLIGATlON FILED NOV.24, 1911.

Patented July 8, 1913.

a x E TOR:

IN V MA.

WI 7 N E SSE S ATTORNE UNITED STATES PATENT OFFICE.

FRANK C. ROBERTS, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO UNDERWOOD TYPEWRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

I TYPE-WRITING- MACHINE.

. y To all whom it may concern:

Be it known that I, FRANK C. Thomas, a citizen of the United States, residing in Philadelphia, in the county of Philadelphia and State of Pennsylvania, have. invented certain new and useful Improvements in Type-\Vriting ltlachines, of which 'the following is a specification.

My invention relates to typewriters equipped with tabulating devices.-

T he tabulating devices are usually operatcd'from a tabulator key which needs to be held in operative position until the stop' form of plungers, which are elevated by meansof keys to intercept a stop on the carriage, and which also release the carriage rack bar from the letter-feed escapement.

Each of these plungers-is provided with a latch which looks it. in its elevated position and holds the carriage rack released until the typewriter carriage is arrested by theplunger. released.

In the drawings: Figure 1 represents a sectional side View of a typewriter having my improvements attached. Fig. view of the same ztnom the rear. Fig. 3 is an en larged section viewed oppositely to Fig. 1'. Fig. 4 is an enlarged detail. Fig. 5 is a diagrammatic view from above showing the relation of stops and latches in Fig- 2.

p In the drawings 1 is a t-abulator key of a typewriter, operating through lever 2 to The latch is then automatically raise a plunger 3, there being ten such plun gers set at letter-space intervals so as to arrest the carriage 5 of the typewriter at any selected letter space; ii-Said plunger 3 is guided in a closely fitting slot in a plate 40 at the top of the standard 41in which said ptungers reciprocate, and isadaipted to move Specification of Letters Patent.

Application filed November 24, 1911.

Patented July 8, 1913.

Serial No. 662.086.

into the path of stop 4 mounted on rackbar P of the carriage 5 of the typewriter. The carriage 5 is fed forward by means of )inion (3 connected to the escapement wheel 12 and meshingin rack 7 pivotally supported on the carriage at 8. The letter feeding meansshown is of the usual Underwood type in which character key levers depress bell cranks 34: to cause type 35 on type bars 10 to print on a platen 36' in the carriage 5, each type-bar 10 comprising a heel 9 adapted to strike a universal bar 11 and control the escapement wheel 12 through dog :13 and link 14. This pinion 6 is disconnected from the carriage when the tabulator key is pressed, in order to allow the typewriter carriage to move up to the plunger. To acconi plish this, rack 7 is raised clear of pinion 6 y idle wheel 16 which is mounted on lever 17 and which is moved by plunger 3 through link 18 and lever 19, said lever 19 pivoted at 37 and including a universal extension 7 which is struck by a ledge 38 on each plunger 3 as it rises. Rack 7 thus isheld clear of pinion 6 and the carriage is pulled by the spring barrel 5 till it is brought to rest again by stop 4 striking plunger 3. 7

Means are provided for holding plunger-s 3 elevated and for preventing rack 7 from rengaging with the escapcment until the carriage comes to rest with stop 4 against plunger 3. These comprise a latch -2O carried on each plunger 3 by pivot pin 21. and adapted when raised to rest on shelf '22 of guide member 23 (see Fig. 2) and thussup; port phmger 3. The lower end ll of said latch 20 is guided in slot 25, one side of which is cut away at the top to form said shelf 22. Spring 26 presses latch lO'ag-ainst the side of slot 25 so that the latch will catch on the shelf 2, and slot 27 is provided in guide member 28 for the pivot 21 of thelatch .20 to ride in. y As shown in Fig il the lower ends of outer latches 20 are bent outwardly at 29 and again downwardly at This affords more room for springs 26 and shelves Latch 20 swings on its pivot when the lower end swings onto shelf 29. so the upper end swings in the opposite direction. This is arranged to be toward stop 4 on the carriage. (See top plan view Fig. 5). The projecting upper end 31 of latch 20 will then be struck by stop4,--jus t before the upper end of the plunger 3 is struck by the causes rack 7 to rengage with pinion 6, and

then the letter-feed escape-inent from the type bars controls the carriage. I

Variations may be resorted to within the scope of the invention, and portions ofthe improvements may be used without others.

- claim 1.

-Having thus described my invention, I

1; In a typewriter, the combination ofa carriage, a letter-feeding device for said carriage operated by the keys, a stop device for tl'iccarriage, a counter-stop to arrest the carriage, a latch carried by the counter-stop, a shelf for the lat-ch to engage, a spring to throw the latch to'engage the shelf, and means to release the latch.

2. In a typewriter, the combination of a carriage, a letter-feeding device for said car riage operated by the keys, a carriagestop, a plunger-pr counter-stop to. arrest the carriage, a latch carried by the plunger having an arm which extends into the path of the carriage when the plunger-is moved to arrest the carriage, a shelf for the. latch to engage, and from which the latch is adapted who released when the earriage's'trikes the said arm of the latch.

. 3. In a 'typewriter, the combination of a carriage, a letter-feeding device for said carriage operated by the keys, a. carriage st0p,.

. carriage, a lettenfeeding device for said carriagc operated by the keys, a carriage stop,

a plunger or counter-stop adapted to be raised to arrest such feed, a bar pivoted to said plunger'having one arm adapted to rest on a. ledge to lock said plunger, and another adapted to be struck by said carriage to release said lock, :1- guide slot in the main frame for the pivot for said bar, and a spring tending to move said bar to locking position.

5. In a typewriter, the combination of a carriage, a. rack bar for letter-feeding said carriage, a carriage stop, a plunger or counter-stop. a key adapted to disconnect said rack from the letter-feeding device and raise said plunger to arrest the free movement of saidcarriage and a. latch pivoted on said plunger for maintaining said rack and'plungcr in the position moved by said key.

'6. In a typewriter, the combination ofa carriage, a rack bar for letter-feeding said carriage, a stop for the carriage, a plunger or counter-stop, a key adapted to disconnect said rack from theletter-feeding device and to raise said plunger toarrest the free move ment of said carriage, a bar pivoted on said plunger, having one end adapted to be struck by said carriage when it is raised with the plunger, having also an end to rest on a ledgeifrom which it is thrown by the imp-actof said'carriagefa spring serving to press said latter end on the ledge when the" bar is raised and. make it serve as a latch there, and a spring drawing down said plunger and reconnecting said rack and let- I tor-feeding device, when said bar is free from the ledge.

7 In a typewriter, a carriage, a member to slop said carriage, a latch'pivoted on said member, and adapted to swing into engage.- ment. with a fixed step, to lock said member latch'on its pivot to release it.

S. In a typewriter, a'carriage, a -mem- I her to stop said carriage, a latch carried by said member to lock it in position to stop said carriage, a spring tending to draw said member from said "position, a sprin moving said latch to engage with a fixed s elf, and means on the carriage to release saidlatch, and permit said first spring to move said member. r

9. Ina typewriter, a carriage, a series of members adapted to be moved to a position to stop said carriage, a latch pivoted on each of said members-to'lok it in operative position, and means on the carriage to swing the late-h on its member, before'the' carriage e-nga'gcs said member. 1 I

10. In a typewriting machine, the combination with a traveling carriage, of a stop thereon, of a plunger to intercept said stop, a holding member, alatch on said plunger and a pivot on which said latch is carriedwhereby said latch may be swung to intercept'said holding member and hold said plunger erect, and whereby said plunger when held erect may be released by said stop striking said latch, so that said plunger may directly strike said stop andarrest said carriage, whereby imperfect operation of the tabulating plunger by falling and thereby arresting the carriage prematurely is pre ented.

11. In a typewriting machine, the combination with a typewriter carriage and a tabulator plunger arranged to arrest said carriage, of a close fitting guide in which sa d plunger travels, a latch pivoted n said plunger, a catch on which said latch is arranged to catch when said plunger s raised,

a spring arranged to so swing said latch. and an extension of Said latch arranged to lie in the path of said carriage, so that said stop will swing said latch free of said catch and cause the plunger to be released.

12. In a typeWrit-ing machine, the combination with a traveling carriage and a stop thereon, of a tabulating plimger arranged to arrest said carriage by said stop, a latch on said plunger to hold it set, means for svi ingmg said latch on said plunger into the path of said stop, so that said stop will reach said latch before it reaches said plunger, and a spring for Withdrawing said plunger.

13. In a typewriter, the combination of a carriage, a letter-feeding device for said carriage operated by the keys, column-stops on the carriage, a counter-stop engageable by the column-stops to arrest the carriage, and a latch pivoted on said counter-stop to hold it projected, and releasable by the columnstop prior to the engagement of the column stop with the projected counter-stop.

[4. ln a typewriting' machine, the combinatiol. ot' a carriage, column-stops, a set of denominational counter-stops, means eonnccted to said counter-stops to release the carriage, latches on said counter-stops, and means for projecting the counter-stops and bringing the latches within the path of the column-stops.

15. In a typewriting machine, the combination of a carriage, releasable letterfeeding mechanism therefor, tabulating mechanism for said carriage including a carriage stop and a key-operated co-nnterstop, and a latch on said key-operated stop movable by said key into the path of said carriage stop; means being provided for the releasing of said latch by said carriage stop prior to the engagement of the carriage stop with the counter-stop.

FRANK C. ROBERTS. Witnesses WM. J. MEEHAN, A. S. CoU' *Rum.

Copies of this patent may be obtained for dive cents each, by addressing the Commissioner of Patents, Washington, D. C. 

